• 1- For question 1.2.2, the theorem that every convex set is the intersection of its supporting hyperplanes is actually in the text. The whole point of this question is checking this theorem for this baby example. many students just referred to that theorem. 1 or 2 marks were taken off here, which is quite lenient.
• 2- For question 1.2.3, most students had the right idea, but the analysis was not accurate enough. They should check the solutions.